Date: Fri, 13 Jul 2001 10:14:52 +1200 From: "Juha Saarinen" <juha@saarinen.org> To: "'Matt Dillon'" <dillon@earth.backplane.com> Cc: "'Jonathan Fortin'" <jfortin@akalink.com>, <freebsd-stable@FreeBSD.ORG> Subject: RE: RE: Regarding New FreeBSD BenchMark From Sysadmin Mag (left out a fiew tuning options) Message-ID: <007b01c10b20$12f9e2f0$0a01a8c0@den2> In-Reply-To: <200107122159.f6CLx3M51540@earth.backplane.com>
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:: SCSI drives have tags, you don't have to lift a finger. :: Turning on :: write caching on top of using tags is extremely dangerous anyway, :: much more dangerous then turning on write caching for an :: (untagged) :: IDE drive. You mean tagged command queueing? da0 at sym0 bus 0 target 0 lun 0 da0: <IBM DDYS-T36950N S93E> Fixed Direct Access SCSI-3 device da0: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled da0: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C) da1 at sym0 bus 0 target 1 lun 0 da1: <IBM DDYS-T36950N S93E> Fixed Direct Access SCSI-3 device da1: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled da1: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C) Does the 'debug.vfscache' sysctl hurt performance? It's set to '1' by default in 4.3-STABLE by the looks of it. -- Juha To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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